8  Variables, expression and statements: R

8.1 Data Types

Some of the commonly used objects in R are numbers - integer and double (or numeric), character and logical (TRUE/FALSE). The data type of the object can be identified using the in-built R function class(). For example, see the following objects and their types:

class(4)

[1] "numeric"

class(4.4)

[1] "numeric"

class('4')

[1] "character"

class(TRUE)

[1] "logical"

8.2 Variable names